ALEXANDRIA, Va., April 21 -- United States Patent no. 12,606,472, issued on April 21, was assigned to Hampton Roads Sanitation District (Virginia Beach, Va.) and D.C. Water and Sewer Authority (Washington).

"Method and apparatus for multi-deselection in wastewater treatment" was invented by Maureen O'Shaughnessy (Herndon, Va.), Christine deBarbadillo (Washington), Charles Bott (Virginia Beach, Va.), Haydee De Clippeleir (Washington), Bernhard Wett (Innsbruck, Austria) and Sudhir Murthy (Herndon, Va.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method and system for deselecting biological solids in an influent containing water. The method and system include supplying an influent to an inlet of a reactor c...